C 2500 Yukon XL 2WD V8-8.1L VIN G (2002)
4. If equipped with a 4.8L, 5.3L, or 6.OL engine, remove the engine wiring harness/auxiliary negative battery cable bolt.
5. Remove the auxiliary negative battery cable.
6. If equipped with a 8.1L engine, remove the engine wiring harness/auxiliary negative battery cable bolt.
7. Remove the auxiliary negative battery cable.
INSTALLATION PROCEDURE
IMPORTANT: Install the auxiliary negative battery cable terminal behind the engine wiring harness ground terminal.